- Title
- Structure of coal-derived metal-supported few-layer graphene composite materials synthesized using a microwave-assisted catalytic graphitization process
- Creator
- Islam, Faridul; Tahmasebi, Arash; Wang, Rou; Yu, Jianglong
- Relation
- Nanomaterials Vol. 11, Issue 7, no. 1672
- Publisher Link
- http://dx.doi.org/10.3390/nano11071672
- Publisher
- MDPI AG
- Resource Type
- journal article
- Date
- 2021
- Description
- Metal-supported few-layer graphene (FLG) was synthesized via microwave-assisted catalytic graphitization owing to the increasing demand for it and its wide applications. In this study, we quickly converted earth-abundant and low-cost bituminous coal to FLG over Fe catalysts at a temperature of 1300 °C. X-ray diffraction, Raman spectroscopy, transmission electron microscopy, and N2 adsorption–desorption experiments were performed to analyze the fabricated metal-supported FLG. The results indicated that the microwave-irradiation temperature at a set holding-time played a critical role in the synthesis of metal-supported FLG. The highest degree of graphitization and a well-developed pore structure were fabricated at 1300 °C using a S10% Fe catalyst for 20 min. High-resolution transmission electron microscopy analysis confirmed that the metal-supported FLG fabricated via microwave-assisted catalytic graphitization consisted of 3–6 layers of graphene nanosheets. In addition, the 2D band at 2700 cm−1 in the Raman spectrum of the fabricated metal-supported FLG samples were observed, which indicated the presence of few-layer graphene structure. Furthermore, a mechanism was proposed for the microwave-assisted catalytic graphitization of bituminous coal. Here, we developed a cost-effective and environmental friendly metal-supported FLG method using a coal-based carbonaceous material.
- Subject
- few-layer graphene; catalytic graphitization; microwave irradiation; iron oxide
- Identifier
- http://hdl.handle.net/1959.13/1457177
- Identifier
- uon:45312
- Identifier
- ISSN:2079-4991
- Rights
- © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/)
- Language
- eng
- Full Text
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